Lever and quadrant mechanism



Feb. 14, 1928.

J. E. BODA LEVER AND QUADRANT MECHANISM 'Filed Jan. 10. 1927 2Sheets-Sheet 1 Feb. 14, 1928.

J. E. BODA LEVER AND QUADRANT MECHANISM Filed Jan. 10, 1927 2SheetsSheet 2 Patented Feb, 14, 1928 UNITED STATES PATENT OFFICE.'

JOSEPH E. BODA, F DIXON, ILLINOIS, ASSIGNOE TO 3'. I. CASE THBE SHINGMACHINE COMPANY, OLE RACINIE, WISCONSIN, A CORPORATION OF WISCONSIN.

LEVER AND ounnnanr MECHANISM.

Application filed January 10, 1927. Serial No. 160,031.

This invention relates to lever and quadwherein I have illustrated onepractical and rant mechanisms, and one object of the inapprovedembodiment of the invention and vention is to provide a mechanismthrough in which- 2 which the power of the operatoron themain Fig. 1 isa side elevation, with one limb i lever may be more efliciently appliedtothe of the quadrant frame removed, showing 55 part that is shifted bythe swing of the the main lever and the draft appliance in lever.Another object is to provide a lever substantially their rear-mostposition and and quadrant mechanism by which the eX- also SllOWlIlg' indotted linesan intermediate tent of movement of the shifted part mayposition of the parts during a complete forbe increased overconstructions wherein the ward pull on the draft members; so-

. draft bar or pull link is connected directly Fig. 2 is a similar Viewshowing the posito the lever. i tion of the parts at tlie completion ofthe I My invention has been designed chiefly forward pull on the draftmembers;

for use on agricultural implements, more Fig. 3 is a section on the line3-3 of especially those known as disc harrows. I It Fig. 2; r

is customary to build disc harrows with a Fig. 4: is a detailed view ofthe upper porpair of disc shaft sections independently tion of the mainlever showing the double mounted on the frame and so arranged that griplevers thereon. the sections may be adjustedrelatively and at I haveherein illustrated the device as ap- 0 Various angles to the line ofdraft for the purplied to the forward end of a multiple sec- 70 pose ofthoroughly pulverizing the ground, tion disc harrow such as is shown,for ex Some disc barrows are builtwith two front ample, in LettersPatent to Henry S. Smith disc sections and two rear disc sections; allNo. 1A89,020, April 1, 1924:, but it is to be so mounted that they maybeshifted to posiunderstood that the invention is capable of tions atright angles to the line of draft or general application as an improvedlever 1'5 obliqueto the line of draft. In such impleand quadrantmechanism, regardless of the ments the shifting of the disc sections isparticular machine or implement on which commonly effected by a singlehand lever it is used. i i i and quadrant mechanism, the lever beingReferring to thedrawings, 1O designates connected through suitable leverand link the draft bar of a disc harrow, to the forso draft members tothe several disc sections, ward end of which the team or tractor is atsothat, when the lever is thrust forwardly tached. This draft beamfasshown in Fig. the disc sections are swung from oblique to 3, comprises apair of spaced parallel bars,

right angle positions, and when the lever is between which the lever andquadrant ss pulled rearwardly, the disc sections are remechanism ismounted. Rigidly secured to versely actuated. This requires theapplicathe right hand draft bar, viewing Fig. 3, tion of considerablepower to the lever, esas by bolts 11 is a V-shaped quadrantframepecially if the disc sections be not fully piece 12, the upper endsof which are raised clear of the ground; and, as above spanned by anarcuate segment rack 13 atstated, a leading object of the invention istached to the frame-piece 12 by cap screws 90 to provide a mechanism bywhich the power 14. Similarly attached to the left hand on the lever maybe more ei'licientlylappliedg draft bar 10, viewing Fig. 3, as by bolts'15 and whereby also an increased length of i is a somewhat shorterV-shaped frame bar movement may be obtained. i p .16. Extending betweenthe lower ends of Still other objects and attendant advan the quadrantframe-pieces 12 and16 is a 95 tages of the invention will be apparenttopivot bolt 17. Pivoted at its lower end on persons skilled in the art asthe same bethe bOlt 17 is the main operating lever 18 lye comes betterunderstood by refereneeto the ing substantially centrally between thetwo following detailed description, taken in con members of the draftbar 10. Also pivoted 'nection with the accompanying drawings atone endon the bolt 17adjacent to the loo main lever 18 is a swinging quadrantmember 19 having substantially the gooseneck form shown in Figs. 1 and2, said swinging quadrant member being formed with a plu- "ality ofnotches 20 in its upper edge. To the other end of the member 19 ispivoted at 21 a link 22 which is pivoted at its rear end at 23 to avertically disposed lever 24 fulcrumed midway of its length on a pivotpin 25.niounted in a pair of brackets 26 attached to the main draft bar10. In the instance shown a draft link 27 connected to the lower end oflever 2% is operatively connected to the front pair of disc sections,and

a draft link 28 pivoted to the upper end of the lever 24: constitutes anelement of the shifting mechanism for the rear disc sections.

To the sides of the lever 18 are attached as by bolts 29 and a cap screw30 a pair of metal straps 31 and that constitute guides and lateralsupports for a pair of locking dogs 33 and 3%, respectively. The strap31 throughout its intern'iediate portion is spaced from the lever 18,and the pivoted rack bar 19 plays between said parts. The upper end ofthe guide strap 31 is laterally offset and apertured to receive the stemof the dog 33 and form anabutment for the upper end of a coil thrustspring 35 encircling said stem and, through engagement with a cross-pin3G, urging the dog downwardly. At awsuitable point the strap 31 isslotted, as shown at 37 to permit the passage therethrough of thelocking tooth 33 of the dog, which engages with the notches 20 of themovable rack bar 19. The other strap 32 similarly offset to overlie theouterside of the quadrant rack bar 13, and its upper end is laterallyoffset and apertured to form a guide for the stem of the other lockingdog 34 which is normally pressed downwardly by a thrust compressionspring 38 acting on a cross-pin 39. The guide strap 33 is similarlyslotted as shown at 40 to accommodate the tooth 34: of the dog 34 whichcooperates with the notches of the quad- 'ant rack bar 13. Links 41 and42 connected to the upper ends of the locking dogs 33 and 3%respectively extend upwardly alongside the lever and at their upper endsare coir nected to vertically spaced and independently operable griplevers 43 and +14: (Fig. l) pivoted on the lever 18.

The manner in which the device may be operated is evident from theforegoing description of its structure but may be briefly travel, theoperator, raising the dog 34,

throws the lever from the position shown in full lines in Fig. 1 to thedotted line position shown in the same figure. This, through theengagement of the dog 33 with the shiftable rack bar 19 advances thelatter to the position shown in dotted lines in said ligure. Theoperator then retracts both locking dogs and swings the lever rearwardlyuntil the dog 33 is in line with the rearmost notch of the rack bar 19,whereupon he lowers the dog 33 into said notch and again swings thelever forwardly, carrying the parts to the position shown in Fig. 2, inwhich position the rack bar 19 is locked through the engagement of bothdogs with their respective rack bars. Similar manipulation of the leverand locking dogs in the reverse direction from the position shown inFig. 2 returns the parts to the position shown by full lines in Fig. 1.Instead of effecting the entire movement by two shifts of the, operatinglever, it may manifestly be effected by several successive shifts,engaging the locking dog 33 successively with the notches of the rackbar 19, instead of only with the end notches. Such manipulation somewhateasier due to the fact that the lever is in all positions more nearly atthe vertical, or at a right angle to the line of thrust exerted by theoperator. The device not only renders the work easier for the operatorby enabling him to shift the parts by a step by step movement ratherthan by a single continuous movement, but it also increases the extentof throw possible with a given size of stationary quadrant.

I have herein shown and described one simple and practical embodiment ofthe invention especially adapted for use on such implements as multiplesection disc barrows, but it is manifest that the structural details maybe variously modified to adapt the mechanism for other uses withoutinvolving any departure from the principle involved or sacrificing anyof the advantages secured. Hence, I reserve such variations andmodifications as fall within the spirit and purview of the appendedclaims.

1. In a device of the character described, the combination of a draftbar, a V-shaped quadrant frame rigidly mounted on said draft bar, anarcuate rack-bar mounted on the upper end of said quadrant f'ame, acurved rack-bar pivoted at one end on the apex of said quadrant frameand lying latlimbs of said frame, a gooseneck rack-bar pivoted at oneend on the apex of said frame and disposed laterally opposite to saidareuate rack-bar and its frame, a pull and push 5 link connected to theother end of said gooseneek rack-bar, a lever pivoted at its lower endon the pivot of said gooseneck rack-bar and lying between the latter andsaid a-rcuate rack-bar, guides mounted on opposite sides of said lever,and independently operable locking dogs having stems slidable in saidguides and teeth on their lower ends playing through slots in saidguides and c0- operating respectively with said rack-bars.

JOSEPH E. BODA.

